59/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 1,648 Google reviews.
Best Septic Service Companies in San Mateo, CA (2026)
48 septic service companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in San Mateo: Wizard Plumbing and Drain, CR Score 59/100; 4.8★ from 1,648 Google reviews; open 7 days a week.
- 3
Best for emergencies (open 24/7): Hydroworks Plumbing, posts 24/7 hours; ranked #3 of 48.
- 2
Most-reviewed: Caccia Home Services, 1,910 Google reviews at 4.9★, the most of 48 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
48 San Mateo septic service companies are ranked here by CR Score, from ten published factors. 27 are open 24/7, 42 open Saturdays and 35 open Sundays, based on posted hours. The median Google rating is 4.9★ across 48 rated businesses.
Top 10 septic service companies in San Mateo at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Wizard Plumbing and Drain | 59 | 4.8★ (1,648) | San Mateo | Sat · Sun · Evenings | Overall |
| 2 | Caccia Home Services | 59 | 4.9★ (1,910) | Burlingame, 4 mi away | Sat · Sun · Evenings | Most reviews |
| 3 | Hydroworks Plumbing | 58 | 5.0★ (27) | Hayward, 12 mi away | 24/7 | Emergencies |
| 4 | Tremors Plumbing And Sewer Inc. | 57 | 5.0★ (29) | San Mateo | 24/7 | — |
| 5 | PICHANGA PUMPING SERVICE LLC | 57 | 4.9★ (70) | Mountain View, 16 mi away | Sat · Sun | — |
| 6 | A-1 Septic Tank Service Inc | 56 | 4.4★ (34) | Hayward, 15 mi away | 24/7 | — |
| 7 | Ace Plumbing & Rooter, Inc. | 55 | 4.9★ (931) | San Francisco, 15 mi away | Sat · Sun · Evenings | — |
| 8 | All Pro Plumbing and Rooter | 55 | 4.6★ (93) | San Mateo | 24/7 | — |
| 9 | Trinity Liquid Waste Services | 55 | 4.9★ (62) | Dublin, 2 mi away | 24/7 | — |
| 10 | All Hayward Plumbing, Drain & Sewer Co. | 55 | 5.0★ (43) | Hayward, 12 mi away | 24/7 | — |
The 48 best septic service companies in San Mateo, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Burlingame, 4 mi away
59/100CR ScoreRanked #2 because of its Google rating and review volume: 4.9★ from 1,910 Google reviews, the most in San Mateo.
Based in Hayward, 12 mi away
58/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Septic system service”.
Based in San Mateo
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Plumber”.
Based in Mountain View, 16 mi away
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 70 Google reviews, listed on Google as “Septic system service”.
Based in Hayward, 15 mi away
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.4★ from 34 Google reviews, listed on Google as “Septic system service”.
Based in San Francisco, 15 mi away
55/100CR ScoreRanked #7 because of its Google rating and review volume: 4.9★ from 931 Google reviews.
Based in San Mateo
55/100CR ScoreRanked #8 because of its Google rating and review volume: 4.6★ from 93 Google reviews.
Based in Dublin, 2 mi away
55/100CR ScoreRanked #9 because of its Google rating and review volume: 4.9★ from 62 Google reviews.
Based in Hayward, 12 mi away
55/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “Plumber”.
Based in Redwood Shores, 1 mi away
55/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 12 Google reviews, listed on Google as “Plumber”.
Based in San Mateo
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.8★ from 46 Google reviews, listed on Google as “Plumber”.
Based in San Lorenzo, 12 mi away
54/100CR ScoreRanked #13 because of its Google rating and review volume: 5.0★ from 94 Google reviews.
Based in South San Francisco, 7 mi away
54/100CR ScoreRanked #14 because of its Google rating and review volume: 4.6★ from 119 Google reviews.
Based in Redwood City, 7 mi away
54/100CR ScoreRanked #15 because of its Google rating and review volume: 4.9★ from 55 Google reviews.
Based in San Jose, 25 mi away
53/100CR ScoreRanked #16 because of its Google rating and review volume: 4.9★ from 433 Google reviews.
Based in Daly City, 10 mi away
53/100CR ScoreRanked #17 because of its Google rating and review volume: 5.0★ from 486 Google reviews.
Based in Sunnyvale, 20 mi away
52/100CR ScoreRanked #18 because of its Google rating and review volume: 4.9★ from 137 Google reviews.
Based in Sunnyvale, 21 mi away
52/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 97 Google reviews, listed on Google as “Plumber”.
Based in San Francisco, 17 mi away
52/100CR ScoreRanked #20 because of its Google rating and review volume: 5.0★ from 74 Google reviews.
Based in Belmont, 13 mi away
52/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Plumber”.
Based in Hayward, 17 mi away
52/100CR ScoreRanked #22 because of its Google rating and review volume: 4.8★ from 98 Google reviews.
Based in San Ramon, 24 mi away
52/100CR ScoreRanked #23 because of its Google rating and review volume: 4.8★ from 271 Google reviews.
Based in Cherryland, 3 mi away
52/100CR ScoreRanked #24 because of its Google rating and availability: 4.5★ from 16 Google reviews, open 24/7.
Based in Alamo, 13 mi away
52/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.2★ from 24 Google reviews, listed on Google as “Plumber”.
All 48 septic service companies
#1 to #25 are shown in full above. Here are #26 to #48, in CR Score order; each links to its profile.
Also serving San Mateo
9 more septic service companies within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Bay Area Restaurant Services LLC | 23 mi | |
| Castro Valley's H & R Plumbing - Plumbing Sewer Repair and Installation, Drain Cleaner | 15 mi | |
| Quick Fix Septic | 15 mi | |
| Ring's Bobcat & Drilling Services | 5.0★ (1) | 17 mi |
| SDR Plumbing And Sewer | 5.0★ (1) | In San Mateo |
| Septic Services in Oakland | 17 mi | |
| Sewer Rat Plumbing | 3 mi | |
| Sewer Rat Plumbing, Inc. | 1.0★ (1) | 16 mi |
| The Home Depot | 4.0★ (1,633) | In San Mateo |
How we ranked San Mateo septic service companies
We scored 48 San Mateo septic service companies on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 3, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In San Mateo data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Septic service companies in San Mateo: frequently asked questions
Who is the best septic service company in San Mateo?
By CR Score, the highest-ranked septic service company in San Mateo, CA is Wizard Plumbing and Drain with a CR Score of 59/100. It has 4.8★ from 1,648 Google reviews. It is open 7 days a week. Caccia Home Services (#2) and Hydroworks Plumbing (#3) follow. We ranked 48 septic service companies on ten factors, last updated November 3, 2026.
How many septic service companies are there in San Mateo?
ContractorsRanked ranks 48 septic service companies serving San Mateo, CA. 4 of them are based in San Mateo; the rest serve it from nearby towns. Another 9 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which septic service companies in San Mateo are open 24/7?
27 ranked septic service companies in San Mateo post 24/7 hours. The highest-ranked are Hydroworks Plumbing (#3), Tremors Plumbing And Sewer Inc. (#4) and A-1 Septic Tank Service Inc (#6). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which septic service companies in San Mateo work on weekends?
42 of 48 ranked septic service companies post Saturday hours and 35 post Sunday hours. The highest-ranked open Saturdays are Wizard Plumbing and Drain (#1), Caccia Home Services (#2) and Hydroworks Plumbing (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do San Mateo septic service companies have?
The median Google rating among 48 rated septic service companies in San Mateo is 4.9★, with a median of 33 reviews. Caccia Home Services has the most, 1,910 reviews, and ranks #2. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank septic service companies?
Each septic service company gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do septic service companies outside San Mateo count in this ranking?
Yes, if they are within 25 mi of the San Mateo city center, our service radius for septic service companies. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Can septic service companies pay to rank higher on ContractorsRanked?
No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.
Update log for San Mateo
- November 2026: CR Scores recalculated for 48 septic service companies serving San Mateo.
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